Clinical Research Directory

Posterior Quadratus Lumborum Block Technique A 2-6 MHz convex ultrasound probe will be positioned parallel to and over the iliac crest. Anterior and posterior scanning will identify the quadratus lumborum, psoas major, transversus abdominis, external and internal oblique muscles, lumbar vertebral body and transverse process, and perirenal adipose tissue. An 80-mm Stimuplex needle will be advanced in-plane under continuous ultrasound visualization. After negative aspiration, 30 mL of 0.25% bupivacaine will be injected into the posterior fascial plane of the quadratus lumborum muscle. Spread of the solution will be observed continuously using ultrasound, with repeated aspiration during injection.

Transversalis fascia plane block administration technique: A 2-6 MHz convex ultrasound probe will be positioned parallel to and over the iliac crest. Anterior and posterior scanning will identify the quadratus lumborum, psoas major, transversus abdominis, external and internal oblique muscles, lumbar vertebral body and transverse process, and perirenal adipose tissue. An 80-mm Stimuplex needle will be advanced in-plane under continuous ultrasound visualization. After negative aspiration, 30 mL of 0.25% bupivacaine will be injected over the perirenal adipose tissue beneath the transversus abdominis fascia. Spread of the solution will be observed continuously using ultrasound, with repeated aspiration during injection to reduce the risk of intravascular administration.